Due to Covid-19, satisfactory hand washing/hygiene is more vital than ever. And realistically people do not always get up to wash their hand with soap and water every single time. People look for easy access which is hand sanitizer. In this study two formulation of alcohol-based hand sanitizers both contain 75% Isopropyl Alcohol but formulation #1 has 30% Hydrogen Peroxide. Testing the formulations effectiveness by comparing it to other store brand hand sanitizers (Germ X, Walgreens, Bath and Body Work, Artificial, and Purell). The method used in this experiment placing 100 microliters of bacteria onto Agar plate. Used cotton swab to spread it out and let it dry. Place holes inside of the agar plate and put 200 microliters of hand sanitizer in each hole and let it incubate overnight at 37℃. Next day measure the zone of inhibition in millimeters. In conclusion, this study results show that the more Alcohol is present in the hand sanitizer the less bacteria can grow. The less viscosity the hand sanitizer is the more surface it can cover which means it is able to kill more bacteria with less product. But also found out that Formulation #1 contains Hydrogen Peroxide which gave great result but there is a risk of over kill of bacteria of using this formulation which can potentially not be safe for usage.
